House electric



J. R. WEAVER COIL IRONING MACHINE Filed July 14. 1923 March 27, 1928.

r g m w m w E M 6 w m m J AWESS S:

. ATTORNEY Patented Mar. 27, 1928.

UNITED STATES PATENT OFFICE;

JAMES B. WEAVER, or NORTH IRWIN, PENNSYLVANIA, ASSIGNOR 'ro WESTING- HOUSE ELECTRIC & MANUFACTURING VANIA.

COMPANY, A CORPORATION OF PENNSYL- COIL-IRONING MACHINE.

My invention relates to ironing machines, more especially to machines adapted to iron the insulating coils formed about electr cal conductors such as coil members comprising the windings of dynamo-electric machines.

It is among the objects of my inventlon to provide a device of the above designated character which shall be of simple compact and inexpensive construction.

It is a further object of my invention to provide a device which shall be adapted to the ironing of coil cells or insulating ma terial in an expedient and eflicient manner and which shall be capable of smoothing out the irre ularities and pockets produced by the win ing of insulating material about the conductor members and to maintain a sliding contact of the ironing member with the coil irrespective of the contour and shape of the surface of the coil.

Coils employed in the windings of dynamo-electric machines are provided with insulating coverings usually comprising cloth or paper strips compounded with suitable insulating gums or resins which are applied either prior or subsequent to the wrapping of lthe material on the conductors of the (:01 s.

Since the voltage capacity of electrical machines depends upon'the quality of the insulation used, it is essential that the materials be applied in such manner as to insure uniformity and homogeneity of the insulating structure. It is. also important to maintain the dimensions of the finished coils within the limits of the armature or stator slots in which they are assembled.

In the larger units designed for extremely high voltages, the windings or coils are insulated with mica lamina, united with shellac or other binding material in sheet form, wrapped around the conductor memher and then provided with a protective-surface sheeting of cloth or other fibrous material. The assembled. materials are subjected to heat and pressure to harden the binder to provide a. mechanically strong and electrically efiicient insulation. These coils are sometimes several inches in crosssection and it is difli cult to properly apply the insulating material thereon as it has a tendency to become wavy and porous.

My present invention is directed to a machine adapted to iron the insulating ma- 1923. Serial No. 651,538.

terial on the conductor body after assembling, to solidify the binder to provide a homogeneous structure and to bring the assembled coil to the stage where it is ready to be molded to its final shape.

In the accompanying drawings constituting a part hereof and in which like refer ence characters designate like parts:

Fig. 1 is a side elevational view of a coil ironing machine embodying the principles of my invention,

Fig. 2 is an end elevational view thereof,

Fig. 3 is a transverse sectional View of one of the platen-carrying brackets of the ma chine, taken along the line IIIffIII of Fig. 1,

Fig. i is a transverse sectional View of the central bracket, taken along theline IV-IV of Fig. 1, and

Fig. 5 is a cross-sectional view of a coil member illustrating a plurality of conductors having insulating material wound thereon. 7

Referring to Fig. l, the device comprises a bed 1 supported by a plurality of vertical pedestals 2 and provided with end brackets 3 which are adapted to rotatably mount a plurality of drive shafts 4 connected by a worm gear drive 5 to a motor 6 mounted underneath the bed 1. A plurality of sup porting brackets 7 extending vertically on the bed 1 are secured thereto and rotatable headsS having central openings 9 and radial openings 10 are mounted in the bracket 7. The heads 8. are provided on their outer peripheries with gear. teeth 11 which are adapted to cooperatively engage a plurality of pinions 12 mounted on the drive shafts 4. A plurality of parallel shafts 15 are mov- ..ab].y mounted .in the heads 8 and are provided with segmental gears 1.6 adapted to engage internal gear teeth 1.7 provided inv the inner peripheries of the heads 8. A. pinion 18 adapted to engage the. teeth 17 is Journaled in the central head of the ma chines by a stub shaft 20 having a square head 21 adapted to receive a wrench by which it is manually actuated.

A plurality of hell cranks 22 aresecured to the shafts 15 by keys 23 and a pair of longitudinally extending pressure platens or ironing shoes 24 are pivotally connected to the bell cranks 22 by hinge joints 25. The short ends of the bell cranks 26 are pivotally connected to bolts 27 extending through 1 openings provided in extending lugs 28 formed integrally with or secured to ,the rotatable heads 8. Coil springs 29 are dis- PQSG Cl around the bolts 27 and screw .nuts 30 aresecured en the threaded ends 1,31v to per mit' adjustment of the coil springs 29'. The bell cranks 22 may consist of separate levers which may be secured on the shafts 15. The platens 24 are provided with heating elements which are connected. to collector rings Z35 associated with .a suitable electrical ciri c l t- The tops got the brackets 7 are provided 'withl in ed )ortions36 whiehma 'beo cued r: l y P to permit the entry ofazcoil 37 placed on the "supports 38secured to the bed 1. The supports 38 are provided with adjustablelserew jackets39 to provide proper seating and to insure secure igripping of the coil by the rclamning jaw 1 E The coil 37 usually comprises a plurality of cqnductor members A2, F g. 5, having a plurality of spirally ound superposed layers of insulating sheetmaterialai'l wound ithereon. The layers 43 are of any suitable insulating substance such as mica ,laminge cemented :together by a suitable heat hardening de uch sh l ac a ph noli c densation product.

[The eperati0n.-of :thisdevice is briefly as follows: ,The stub shaft 20gis rotated by means o f-afwrench causing the segment gea-rs V 16 to rotate the shaft 15 against thepressure of ,the lcoilgsprings 29 thereby permitting the bell cranks to be moved angularly, providin a space (between platens 251. The coil 3. is inserted between the platens 24 as illustrated in Figs. land 2 and the pressure thereo s adju b d aw ng up -the n 30 to compress the coil springs 29. 'fllhe hinged portions 36 are closed and the motor 6 ;is then energized, causing the drive shafts I 4 to be actuated to rotate "the heads 8. The z-heating elements in the platens are simultaneously energized by connecting an electrieal circuit With-the collectorringsf35.

As the platens .24 are rotated about the I rcoiil 37, asli'ding engagement is efi'ec ted therebetween which smooths out the irregu- "larities of the insulating material .43 and simultaneously compresses it. The heated platens further soften the binding material and the -,contin11ous sliding contact of the platens therewith molds the insulating materialaboutthe conductor members 42 into a uniferm, homogeneous structure. Thecontinuous heating of the binding material solidifies thesame, after Whichthe coil is .lremor d i mm t mac and in er While ti bQ in f rming molds Wher it i finally melded vto. shape and permitted vto cool. 7 A (th mac ine se to th p 'qps te .s en for a o le desired size, 1.0 iurt arad ;s rs ctien iw mu xdepe 't veiples herein set forth. qr instance, the

therewith provides an eflicient and expedient means for ironing insulating material, and

xthe spring actuated pressure means provides a uniform sliding contact ofthe heat- .able pressure platensalong all points ofthe leoil surtace whether they be traversing along the edges :01" theflat Sides vof the roll and even inrounding the corne s f h s;f a u .iselear-ly distinctive over any prior devices used .tor-jth s-ipulzp se Altheugh, I have described a specificem- :bedime t of my invention, it will be obvious to those skilled in the art that modifieatiens be made in ,the details efeongeneral design of the maehine such as the rotatable supporting members drive shafts,

and actuating mechanism nay be altered to adapt it for any specific application, and

the ,levers, springs, and the method of mounting the platens maybe of any suitable design to accomplish the functiens herein set forth. V

I claim as my invention from the prin- 1 A coil ironing machine (comprising a support, means for mounting a coil thereon, 7

a pair of heatahle pressure platens ,for engaging ,said coil pivoted .at diametrically opipqsite points androtatably ounted on said "supp t, pr ssure m n for said p e comprising a plurality of coil springs and means for adjusting the pressure on said platens independently .pf each other.

' ,2. A ceildroningimaehine comprising ;.a

support, mean r mounting a i h a V o ri n qal heatable pr s ur p a en "f engaging said .coil ,rotat'ably mountedmiv op- -.posite de ef a dt upport, me 'iq s p 'arating said ,platensjor' the removal and insertion of ,a coil,c.pres sur e means for said platens comprising a plurality of .coil springs and means for aghusting the pres- Ill sure o rsaid platens independently ;of each other.

.3. A r coil ironing machine comprising a support, a plurality of 'vertical' rbrackcts mounted thereon, a. plurality of shatts mounted 180 apartin said brackets, a pair of cooperating pressure platens Eactuated thr ugh sa d vshaf ndlspr g p ssu means forisaid p atens sqmp ising a lp ura ity .o i depen ent y adjustabl t i Spring ,assoc eed' w th the mount ng v b a ket thereof.

e A mail .rening ma hin emn is ns he t bl platens, .me'an Tier moun ing :a Coil be ween the h rita le p e 4 rlurali y o rotatable supports, a pair of parallel shafts mounted diametrically opposite each other in said supports, pressure means for said platens comprising a plurality of spring actuated bell crank connections mounted on said shafts, and means for adjustin said springs to vary the pressure of said p atens.

5. A coil winding machine comprising a base, a plurality of rotatable supports geared to a plurality of drive shafts, a pair of shafts mounted at diametrically opposite points in said supports, bell cranks secured to said last named shafts, pressure platens hinged on one end of said cranks, adjustable spring means associated with the other ends of said cranks for varying the pressure of said platens, means for separating said platens against the spring pressure and means for mounting a coil between the platens and securing the same to said base. 7

6. A coil ironing machine comprising a base, a plurality of vertically extending guide brackets mounted thereon, a pair of drive shafts journalled therein, rotatable heads mounted in said brackets, gear wheels on said drive shafts adapted to engage gear teeth provided in the outer periphery of said heads, a pair of shafts mounted diametrically opposite each other in said heads, segmental gears secured on said shafts adapted to engage internal gear teeth provided in said heads, a pinion journalled in one of said heads in engagement With its internal gear teeth, a plurality of cooperating arms mounted on said last mentioned shafts, a pair of heatable pressure platens hinged to said arms, extension lugs on said arms having hinged bolts thereon, coil springs on said bolts adapted to engage extensions on said heads, adjusting nuts for said springs and means for mounting a coil on said base in cooperative engagement with said pressure platens.

7. A coil-ironing machine comprising a support, a plurality of vertical brackets mounted thereon, rotatable heads mounted in said brackets, a pair of identical cooperating pressure platens pivoted at 180 from each other in said rotatable heads and adapted to exert pressure towards each other along a line passing through the center of the rotatable heads.

8. A coil-ironing machine comprising a support, a plurality of vertical brackets mounted thereon, a plurality of rotatable heads mounted in the brackets, two shafts mounted in the rotatable heads at diametrically opposite points, bell cranks secured to the shafts, and a pair of cooperating pres sure platens pivotally mounted on said bell cranks.

,9. A coil-ironing machine comprising means for supporting a coil to be ironed, two identical pivoted pressure members disposed on opposite sides of the said coil and adapt ed to exert pressure upon the full length thereof, and means for rotating said pressure members around the coil to be ironed.

In testimony whereof, I have hereunto subscribed my name this 11th day of July,

JAMES R. VEAVER. 

